| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 01/09/2013 | CN202659228U Perforation pressure gage, dispenser of perforation pressure gage and fisher of perforation pressure gage |
| 01/09/2013 | CN202659227U Inclination detection assembly and inclinometer |
| 01/09/2013 | CN202659226U Working support barrel for perforation pressure gauge |
| 01/09/2013 | CN202659225U Linked type stress test short joint |
| 01/09/2013 | CN202659224U Oil well produced liquid metering device based on computer control |
| 01/09/2013 | CN202659223U Blowout preventing type eccentricity testing screw pump driving device with underneath type seals |
| 01/09/2013 | CN202659216U Remote intelligent production and testing device for oilfield well |
| 01/09/2013 | CN202659146U Double-drilling combined drill structure suitable for drilling operation of oil well and horizontal well |
| 01/09/2013 | CN102869849A At-bit evaluation of formation parameters and drilling parameters |
| 01/09/2013 | CN102865071A Over-metal sleeve magnetosonic resistivity imaging logging method and device |
| 01/09/2013 | CN102865069A Micro-column type focused logging instrument and micro-column type focused logging method thereof |
| 01/09/2013 | CN102865068A Probe |
| 01/09/2013 | CN102865067A Array coil system of azimuthal electromagnetic wave resistivity logging instrument while drilling |
| 01/09/2013 | CN102865066A Experiment device and method for deepwater shaft multiphase flow containing natural gas hydrate phase changes |
| 01/09/2013 | CN102865065A Automatic operation trip measuring device |
| 01/09/2013 | CN102865064A Gas and water flow condition and effect simulation device of coal bed gas well discharging and mining process |
| 01/09/2013 | CN102865063A Oil and gas integrating instrument |
| 01/09/2013 | CN102865062A Physical analog device for electrical logging detector entity built by ultrafiltration |
| 01/09/2013 | CN102071925B Method for tracking, positioning, quantifying and rectifying coordinate of reversed pendulum hole |
| 01/09/2013 | CN101881158B Pipe fluid pressure pulse signal generator |
| 01/08/2013 | US8347985 Mulitmodal geosteering systems and methods |
| 01/08/2013 | US8347958 Systems and methods for distributed interferometric acoustic monitoring |
| 01/08/2013 | US8347957 System and method for servicing a wellbore |
| 01/08/2013 | US8347953 Inline monitoring package for electrical submersible pump |
| 01/08/2013 | CA2692663C Well jet device |
| 01/08/2013 | CA2690390C Wired pipe signal transmission testing apparatus and method |
| 01/08/2013 | CA2661725C Method and system for accessing subterranean deposits from the surface |
| 01/08/2013 | CA2411819C Communicating with a tool |
| 01/03/2013 | WO2013003658A1 Indicating system for a downhole apparatus and a method for locating a downhole apparatus |
| 01/03/2013 | WO2013003349A2 Scintillator-based neutron detector for oilfield applications |
| 01/03/2013 | WO2013002803A1 Downhole sample module with an accessible captured volume adjacent a sample bottle |
| 01/03/2013 | WO2013002782A1 System and method for automatic weight-on-bit sensor calibration |
| 01/03/2013 | WO2013002645A1 Method and device for determining a drill bit's position in a borehole |
| 01/03/2013 | WO2013001139A1 Positioning method for a drilling head |
| 01/03/2013 | WO2013001062A1 Gas lift kickover system |
| 01/03/2013 | WO2013000938A1 Downhole tool for determining laterals |
| 01/03/2013 | WO2012125251A3 System and method to compensate for arbitrary optical fiber lead-ins in an optical frequency domain reflectometry system |
| 01/03/2013 | WO2012104574A3 Downhole pressure relief apparatus |
| 01/03/2013 | WO2012092131A3 Stress in formations from azimuthal variation in acoustic and other properties |
| 01/03/2013 | WO2012082081A3 A method for obtaining diagnostics and control of the pumping process of rod pumped oil and gas wells and devices for the method execution. |
| 01/03/2013 | WO2012068404A3 Method for active cooling of downhole tools using the vapor compression cycle |
| 01/03/2013 | WO2012042222A3 Downhole orientation sensing with nuclear spin gyroscope |
| 01/03/2013 | WO2011157996A3 Controlling well operations based on monitored parameters of cement health |
| 01/03/2013 | US20130003777 Multi Wavelength DTS Fiber Window with PSC Fiber |
| 01/03/2013 | US20130003501 Methods and apparatus for locating hidden or buried non-conductive pipes and leaks therefrom |
| 01/03/2013 | US20130000981 Control of downhole safety devices |
| 01/03/2013 | US20130000980 System and Method for Determining Soil Characteristics and Drillstring Instability During Horizontal Directional Drilling |
| 01/03/2013 | US20130000893 Active seismic monitoring of fracturing operations |
| 01/03/2013 | US20130000892 Drum Load Monitoring |
| 01/03/2013 | US20130000399 Downhole sensors impregnated with hydrophobic material, tools including same, and related methods |
| 01/03/2013 | US20130000398 Electromagnetically heated thermal flowmeter for wellbore fluids |
| 01/03/2013 | CA2840471A1 Downhole tool for determining laterals |
| 01/03/2013 | CA2840463A1 Gas lift kickover system |
| 01/03/2013 | CA2840355A1 Downhole sample module with an accessible captured volume adjacent a sample bottle |
| 01/03/2013 | CA2840298A1 Positioning method for a drilling head |
| 01/03/2013 | CA2839990A1 Downhole signalling systems and methods |
| 01/03/2013 | CA2839763A1 Electromagnetically heated thermal flowmeter for wellbore fluids |
| 01/02/2013 | EP2541235A2 Device, machine and method for determining the condition of a well |
| 01/02/2013 | EP2540957A1 Downhole tool for determining laterals |
| 01/02/2013 | EP2540955A1 Gas lift kickover system |
| 01/02/2013 | EP2539748A2 System and method for correction of borehole effects in a neutron porosity measurement |
| 01/02/2013 | EP2539746A2 Determining the larmor frequency for nmr tools |
| 01/02/2013 | EP2539531A2 Method and device for direction-controlled drilling |
| 01/02/2013 | CN202645551U Drilling fluid density wireless sensing device of petroleum engineering |
| 01/02/2013 | CN202645550U Flash-distillation preventing airtight sampling and metering device for high-temperature high-pressure saturated liquid |
| 01/02/2013 | CN202645549U Lateral log equipment with high resolution ratio |
| 01/02/2013 | CN202645547U High-resolution azimuthal resistivity dual laterolog tool |
| 01/02/2013 | CN202645546U High-resolution dual laterolog tool |
| 01/02/2013 | CN202645545U Downhole two-way data transmission system |
| 01/02/2013 | CN202645544U Underwater wellhead pressure testing plug subjected to gravity excitation |
| 01/02/2013 | CN202645543U Wireless data acquisition device for water injection well |
| 01/02/2013 | CN202645542U Liquid level depth sensing measurement device and probe used for measuring liquid level depth |
| 01/02/2013 | CN202645541U Terrestrial heat deep well dynamic water level measurement and control device |
| 01/02/2013 | CN202645540U Diameter-variable three-detection-depth high-resolution three-lateral logger |
| 01/02/2013 | CN202645539U Borehole clinometer without cable based on synchronous technology |
| 01/02/2013 | CN202645538U Float flow meter used for low-yield liquid oil well flow measurement |
| 01/02/2013 | CN202645537U Inseparable multi-well alternation metering combined device |
| 01/02/2013 | CN202645536U Multipolar subarray sound wave sound insulator |
| 01/02/2013 | CN202645535U Experimental device utilizing conical sand filling pipe to simulate gassy thickened oil depletion production |
| 01/02/2013 | CN202645534U Multi-terminal parameter monitoring system for underground tunnel drilling machine of coal mine |
| 01/02/2013 | CN202645533U Physical simulation experiment device for O-shaped well |
| 01/02/2013 | CN202645528U Separated and separately transported multi-well alternating measuring combination device |
| 01/02/2013 | CN102852516A Full-sew-length three-dimensional crushing data simulation method and device for oil and gas reservoir development |
| 01/02/2013 | CN102852515A Fracture eccentric locating detector for mechanical horizontal well casing |
| 01/02/2013 | CN102852514A Method for determining depth of coal-mine gas drainage drilling hole |
| 01/02/2013 | CN102852513A Continuous oil measuring device of integrating instrument of U-shaped pipe |
| 01/02/2013 | CN102852512A Device and method for monitoring stick-slip vibration of drill bit based on measurement while drilling |
| 01/02/2013 | CN102852498A Device and method for simulating thickened oil viscosity reduction during wellbore lifting |
| 01/02/2013 | CN102116170B Method for determining grid type layer-through drilling intervals of floor roadway |
| 01/02/2013 | CN101765697B Tool face sensor method |
| 01/02/2013 | CN101761328B Stratum geology interface instrument drilling induction recognition system |
| 01/02/2013 | CN101737032B Gamma ray detector in carbon/oxygen spectral logging system with alpha particles |
| 01/01/2013 | US8344904 Signal processing in downhole equipment |
| 01/01/2013 | US8344896 Process for detecting scale formation in a beverage preparation machine |
| 01/01/2013 | US8342262 Boring tool tracking fundamentally based on drill string length, pitch and roll |
| 01/01/2013 | US8342242 Use of micro-electro-mechanical systems MEMS in well treatments |
| 01/01/2013 | US8342241 Delivery of nanodispersions below ground |
| 01/01/2013 | US8342238 Coaxial electric submersible pump flow meter |
| 12/27/2012 | WO2012178026A2 Method for determining spacing of hydraulic fractures in a rock formation |
| 12/27/2012 | WO2012177909A1 Horizontal directional drilling system including sonde position detection using global positioning systems |